Writing a function to find length of given input string.

 

import java.util.Scanner;

import java.util.function.Function;

class StringLengthFunction {

  public static void main(String[] args) {

    Function<String, Integer> f = s -> s.length();

    Scanner sc = new Scanner(System.in);

    System.out.println("Enter a String");

    String str = sc.nextLine();

    while (true) {

      if (str.equals("0")) {

        break;

      }

      System.out.println("The length of String is : " + f.apply(str));

      System.out.println("--------------------------------------------");

      System.out.println("Enter another String");

      System.out.println("Press 0 to exit");

      str = sc.nextLine();

      if (str.equals("0")) {

        break;

      }

    }

  }

}